This is probably the most stupidest question on the internet, but is Sublime Text worth purchasing; I mean it's not like I don't want to purchase it, it's more for the fact I'm a 15 year old developer, who's got no job and get's £5 a week with which I purchase DC Comics with.

Beside getting the "UNREGISTER" watermark in the title, what other features get's added or isn't there any?

Honestly, if you are not doing some super serious development, and you don't feel like your missing anything, if I were a 15 year old, I would go spend my money on some more comics . Especially since there isn't a student discount at all.

As for me, being a programmer in the corporate world, I have purchased a license, but I am in a different place than you.

I should probably rephrase my answer. As someone not in high school, I feel Sublime Text is worth purchasing because it is awesome. But if I was 15, I don't care how awesome the text editor was, I would probably spend my money elsewhere...like comics, music, girls, games etc. (in no particular order).

When you get old, and things like having a good text editor matter more, you can spend 70 bucks on a text editor. But at 15, I just can't see how spending 70 bucks on an editor is better than spending it on something fun. You will have plenty of years to spend your money on boring things like text editors.

FWIW, buying Sublime Text is really up to how much you value your time using it. For me, at 15, I sat at the computer all day after school and had no other life, so having a utility like this would have made things much more enjoyable for me and I would have gladly paid a few months of income on it. But if you do other things too, and this is more of a hobby that you wouldn't get enjoyment from after spending that much of your money on, then hold off. There are plenty of solutions for you to do what you need without paying money. The "Sublime Factor" as I call it (paid version) is more intended for those of us in the industry who don't want to settle for less, and have the funds to allow us to purchase it.

Programming is one of the few things a teenager can get into where the vast bulk of his/her tools can be had for free. I played guitar when I was a teen -- axes, amps, strings, pedals, that really added up. But if I'd been bitten by the programming bug back then, I could've saved all my money for drugs. (I kid, I kid...)

Seriously: I've been using ST with Vintage mode now for a couple months, and I'm a bunch more efficient now than I was back when I was using non-modal editors. I would give up a lot of cool stuff if I had to go to Vim, but I would also get some cool stuff, including $70. That would keep me in guitar strings for months.